CVE-2026-109708
Critical · 9.6CVSS
9.6
EPSS
0.3%
Published
Oct 13, 2026
CISA due date
—
The record
Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, Thunderbird 153.5, and Firefox ESR 115.44.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
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